CN103667356B - 一种干湿联合厌氧发酵工艺 - Google Patents

一种干湿联合厌氧发酵工艺 Download PDF

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CN103667356B
CN103667356B CN201310584133.3A CN201310584133A CN103667356B CN 103667356 B CN103667356 B CN 103667356B CN 201310584133 A CN201310584133 A CN 201310584133A CN 103667356 B CN103667356 B CN 103667356B
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CN103667356A (zh
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王鲁民
辛静
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QINGDAO TIANREN ENVIRONMENT CO Ltd
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Abstract

本发明提供了一种干湿联合厌氧发酵工艺，包括(1)将高浓度发酵原料经装载机送入柱塞泵，再送入干式发酵反应器；(2)将湿式发酵反应器中产生的低浓度发酵残余物，送入缓冲罐，再送入柱塞泵与高浓度发酵原料混合，送入干式发酵反应器。本发明充分结合湿式发酵工艺传质效果好、干式发酵工艺发酵残余物含水量低以及两相厌氧产气效果好的优势，突破传统生物燃气工程面临的技术和推广瓶颈。

Description

一种干湿联合厌氧发酵工艺
技术领域
本发明涉及一种可综合处理各种废弃物的干湿联合厌氧发酵工艺，属于环保领域。
技术背景
湿式发酵工艺和技术设备目前已比较成熟，但利用该工艺建造的生物燃气工程项目在运行过程中易产生大量的沼液，与我国目前的发酵原料种类及形态、农业生产方式和意识形态水平等实际情况不相适应，不利于环境保护和节约水资源，且在生物燃气工程项目运行过程中消耗大量的发酵原料升温所需的能量，成为制约生物燃气工程发展的瓶颈问题。为解决湿式发酵的系列问题，干式厌氧发酵工艺的研究成为热点课题。截止到目前，干式厌氧发酵工艺原料进出厌氧反应器、体系传质和氧化还原电位的控制问题是其中的难点，这些问题解决不好，干湿厌氧发酵工艺大规模工业化应用面临不小的困难。
发明内容
本发明的目的是提供一种可综合处理各种废弃物的干湿联合厌氧发酵工艺，有效解决了干式发酵反应器的进料问题。
本发明的一种干湿联合厌氧发酵工艺，包括以下方面
(1)将高浓度发酵原料经装载机送入柱塞泵，再送入干式发酵反应器；
(2)将湿式发酵反应器中产生的低浓度发酵残余物，送入缓冲罐，再送入柱塞泵与高浓度发酵原料混合，送入干式发酵反应器。
进一步的，本工艺还包括将干式发酵反应器的底部出料送入缓冲罐。
进一步的，所述干式发酵反应器的出料经螺杆泵送入有机肥车间或缓冲罐。
进一步的，所述干式发酵反应器中产生的沼气送入湿式发酵反应器中。
进一步的，所述缓冲罐中及干式发酵罐中均设置热源。
进一步的，所述缓冲罐中的物料经清浆泵送入柱塞泵。
进一步的，本工艺还包括将湿式发酵系统产生低浓度发酵残余物直接送入干式发酵反应器。
本发明产生的有益效果为，本发明的干湿联合厌氧发酵工艺，利用湿式发酵工艺产生的沼液改善干式发酵原料和体系的物理状态，提高干式发酵体系的传质效果，该工艺不仅能够实现干湿联合，还可利用干物料具备兼氧条件易进行水解酸化的特点，实现两相厌氧，将充分结合湿式发酵工艺传质效果好、干式发酵工艺发酵残余物含水量低以及两相厌氧产气效果好的优势，突破传统生物燃气工程面临的技术和推广瓶颈。
附图说明
图1.本发明的干湿联合厌氧发酵反应的工艺流程图。
具体实施方式
本发明的一种干湿联合厌氧发酵工艺，包括以下几个方面：
(1)将高浓度发酵原料经装载机送入柱塞泵，再送入干式发酵反应器。
(2)在柱塞泵之前设置一个缓冲罐，罐中装有流动性较好的发酵残余物，该流动性较好的发酵残余物来自湿式发酵反应器或来自干发酵反应器的底部出料。将缓冲罐中的物料经清浆泵送入柱塞泵与高浓度发酵原料混合，送入干式发酵反应器，所述原料配比与发酵原料的种类及其配合之后的流动性有关系。当干式发酵反应器的进料系统因原料状态问题造成进料不畅时，利用缓冲罐中的低浓度物料对发酵原料进行调节，可以实现顺利进料，解决了干式发酵系统中的进料问题。
(3)将湿式发酵系统产生低浓度发酵残余物直接送入干式发酵反应器。
(4)所述干式发酵反应器的出料经螺杆泵送入有机肥车间或缓冲罐。
(5)所述干式发酵反应器中产生的沼气送入湿式发酵反应器中。
(6)所述缓冲罐中及干式发酵罐中均设置热源。
另外，本发明通过柱塞泵将缓冲罐中流动性较好的发酵残余物从发酵罐顶部注入，一方面提高了发酵物料与活性菌群的接触效果；另一方面利用冲力将罐内体系结壳结构予以破坏，从而改善传质效果，省去了搅拌装置；另一方面还可以与缓冲罐中来自湿式发酵系统的符合温度要求的料液充分接触，解决了干式发酵体系温度不均匀等问题。

Claims (3)

1.一种干湿联合厌氧发酵工艺，其特征在于：包括以下方面
将高浓度发酵原料经装载机送入柱塞泵，再送入干式发酵反应器；
将湿式发酵反应器中产生的低浓度发酵残余物，送入缓冲罐，再送入柱塞泵与高浓度发酵原料混合，送入干式发酵反应器；将干式发酵反应器的底部出料送入缓冲罐；所述缓冲罐中的物料经清浆泵送入柱塞泵；将湿式发酵系统产生低浓度发酵残余物直接送入干式发酵反应器；所述干式发酵反应器的出料经螺杆泵送入有机肥车间或缓冲罐；所述干式发酵反应器中产生的沼气送入湿式发酵反应器中。
2.根据权利要求1所述的一种干湿联合厌氧发酵工艺，其特征在于：所述缓冲罐中设置热源。
3.根据权利要求1所述的一种干湿联合厌氧发酵工艺，其特征在于：所述干式发酵罐中设置热源。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101775359A (zh) * 2009-01-13 2010-07-14 刘相梅 一种直接分解农作物秸秆发酵产沼气的专用微生物复合菌剂制备及其应用方法
CN101973682A (zh) * 2010-10-22 2011-02-16 东北农业大学 干湿耦合厌氧发酵工艺方法
WO2012139563A1 (de) * 2011-04-09 2012-10-18 Dge Dr.-Ing. Günther Engineering Gmbh Verfahren und vorrichtung zur herstellung von biogas aus gärsubstrat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101775359A (zh) * 2009-01-13 2010-07-14 刘相梅 一种直接分解农作物秸秆发酵产沼气的专用微生物复合菌剂制备及其应用方法
CN101973682A (zh) * 2010-10-22 2011-02-16 东北农业大学 干湿耦合厌氧发酵工艺方法
WO2012139563A1 (de) * 2011-04-09 2012-10-18 Dge Dr.-Ing. Günther Engineering Gmbh Verfahren und vorrichtung zur herstellung von biogas aus gärsubstrat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
干湿耦合厌氧发酵工艺设计与发酵特性试验;李文哲等;《农业机械学报》;20130531;第44卷(第5期);第148-153页 *

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